See list of questions tagged filter: some of them are about ffmpeg filters (used for resizing videos and such), some are about filtering data in MS Excel, some are about organising emails... none of these things are the same, or similar enough to be covered by the same tag..

Maybe it should be split up into more specific tags. 'ffmpeg-filters' could certainly be useful, for example (I think this is the most glaring problem, since at least the others are about sorting data).